2010 Persimmon Homes Blog

Charles Church Bouncy Floors, I-Beam Joist Deflection

Posted on: February 24, 2010

Trouble with noisy & bouncy floors, check out these information pages, including a great video (please WATCH this video FIRST) showing simple bridging between joist (cross-bracing) and a method to dramtically improve the poor performing cross bracing. This great video is from a North American Company and features bouncy problems with I-Beam I-Joists. Charles Church (and Persimmon Homes) use I-Joists from JJI Joists in the UK. JJI License the joists design from a Canadian company (North America) called Nascor. Nascor licenses the I-Joists across the world to 18 different companies, including Australia, UK, USA etc.

But be aware, their are different performance specifications for I-Beam joists, depending on thickness of I-Beam joists, depth of joist, spacing and span. Together these give a Suitability Index rating (SI rating). Charles Church used the lowest possible, and cheapest SI rating in our new home. And it didn’t surprise us to learn Charles Church has done this in other new homes.

Other information on bouncy flooring, such as that installed in our home by Charles Church (part of the Persimmon Group plc, which also trades as Persimmon Homes). This is a demonstration of bouncy floors, and brilliantly they quote ‘you’ll end up with nail pop, after nail pop, after nail pop’ by doing what Charles Church do and attaching ceiling plasterboard directly to the joists. Lastly some text based references to bridging, sistering, cross-bracing, straping etc.

But first check out the great video at the top, where an engineer has set up 3 test floors, clearly showing the problems with the cheapest fix, cross bracing with a herringbone noggins, and then a very simple way to dramatically improve the performance. The first method shown is similar to that Charles Church is trying to push onto us and other homes. The last method is far superior, and avoids the problems with standard herring bone cross-bracing.

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2 Responses to "Charles Church Bouncy Floors, I-Beam Joist Deflection"

[…] I learnt about this from another New Homes Blog on Charles Church and Persimmon Homes covering customer complaints. […]

Walked around a new Charles Church Show Home last week, and found same issues discussed above, noisy bouncy floors. when will they fix this? From reading the Telegraph article, the problem appears to go back at least 13 years, yet it would appear most home owners are unaware of the ‘ticking timebomb’ that might seriously effect resale value when they come to sell.

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  • Bob: Perhaps the New Home Builders are enjoying the econmic climate a bit TOO MUCH :(
  • M. Farley: Walked around a new Charles Church Show Home last week, and found same issues discussed above, noisy bouncy floors. when will they fix this? From read
  • Debbie Brown: Neat idea! Can't beat something that makes cake easier to eat and carry.
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